Hot NTA application enhanced metal phytoextraction from contaminated soil
In the present study, a biodegradable chelating agent, NTA was added in hot solutions at 90C to the soil in which beans (Phaseolus vulgaris L., white bean) were growing. The total phytoextraction of metals by the shoots of the plant from 1mnol·kg<-1> hot NTA application exceeded those in the shoots of plants treated with 5mmol·kg<-1> normal NTA solutions. A significant correlation was found between the concentrations of metals in the shoots of beans and the relative electrolyte leakage rate of root cells, indicating that the root damage resulting from the hot solution application might play an important role in the process of chelant-enhanced metal uptake. The application of hot NTA solutions did not increase metal solubilisation significantly in the soil in comparison with the same dosage normal application. Therefore, the application of hot NTA solution may provide a more efficient alternative in chemical- enhanced phytoextraction although further studies on the field application are sill required.
hot NTA phytoextraction metals beans root damage
Chunling Luo Zhenguo Shen Xiangdong Li
Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowl Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowl
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
202-203
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）